已存在的流列表，点击自动播放:

1. 初始演示
2. 每秒自动刷新

url:

simulcast:

useCamera:

audioEnable:

videoEnable:

method(play or push or echo): echo push play

resolution: 4K(UHD)(3840x2160)1080p(FHD)(1920x1080)UXGA(1600x1200)720p(HD)(1280x720)SVGA(800x600)VGA(640x480)360p(nHD)(640x360)CIF(352x288)QVGA(320x240)QCIF(176x144)QQVGA(160x120)

datachannel:

开始(start) 停止(stop)

msgsend:

msgrecv:

发送(send by datachannel) 关闭(close datachannel)

videodevice:

audiodevice:

switchDevice:

切换视频(switch video) 切换音频(switch audio)